I just tested it and it works on Chrome for me.
var elements = Array.from(document.querySelectorAll('p'));
// elements = (3) [p, p, p]
It might not be compatible with many browsers though, as you mentioned.
You don't have to go far - if you have Windows and IE11 installed, that doesn't support either 😉
The MDN documentation also has an Array.from polyfill:
We're a place where coders share, stay up-to-date and grow their careers.
We strive for transparency and don't collect excess data.